Loom apparatus



Aug' 24 1937' l I D. D. GOLDEN 2090726 LooM APPARMUS Filed May 5, 1936 2Sheets-Sheet 1 Tini Aug. 24, 1937. D. D. GOLDEN 2,090,726

LOOM APPARATUS Filed May 5, 1936 2 Sheets-Sheet 2 Patented Aug. 24, 1937UNITEB STATES PATaNr Application May 5,

8 Claims.

This invention appertains to improvements in loom apparatus and inparticular to filling tensioning means therefor, the primary object ofwhich is to positively direct the filling thread into contactingrelation to the detector fork of the loom and to insure its operation bysaid thread as an incident to the beat up movement of the lay.

A further object of the invention is to provide 10 a filling holdingdevice in the form of a unitary attachment designed to clamp the fillingthread at a point between the shuttle box and the cloth for producingtension upon the held thread which will insure the operation of thedetector fork as above premised without the use of a filling grid orgrate so as to prevent the occurrence of thin I places or misspicks inthe weaving of the cloth.

I am aware that it has been proposed heretofore to provide a clampingmeans per se for holding the filling both with and without the usualgrid which, when used, cooperates with the fork, but such devices in noinstance insure sufficient tension of the filling to cause the operationof said fork, resulting in unnecessary stopping of the loom or operationof filling transfer mechanism, according to the type of loom towhichthese devices are applied.

In the majority, if not all, of the looms in commercial practice today,the filling grid is an essential adjunct to insure the provision of asuiicient tension of the filling to actuate the detector fork which cfnecessity, for reasons well known to those skilled in the art, must beheavy to take care of stresses imposed thereon incident to operation ofthe loom stopping mechanism, but these grids have a number ofdisadvantages which make dispensing therewith a thing much to bedesired.

On the other hand, the omission of the grid has been up to now just asdisadvantageous because of the uncertainty of the proper operation ofthedetector fork.

My invention, therefore, has been designed to meet these difficulties byproviding as a part of the filling holding device, a tensioning meanswhich will act as an incident to the movement of the lay to tension thefilling between the cloth andv the holding device sufficiently toelevate the loop of the fork upon each full beat up stroke of saidlay,so long as a single thread is present,

and without the aid of the undesired grid..

In carrying out my invention, I provide a guide member which is soconstructed and arranged in combination with a novel clamping head as toalways guide the iilling to a predetermined posi- 1936, Serial No.78,067

tion to be clamped by the headagainst a part of the loom and after suchclamping to operate the filling as the lay beats up the same intotensioned contact with the fork', whereby said fork is assuredly tiltedand the weaving continued without interruption which would otherwisecause a thin place or misspick.

An essential object is to provide the foregoing mechanism in the form ofa complete attachment unit having adjustment features for theconstituent members thereof to enable its application to conventionaltypes of looms and take care of varying types or conditions in suchapparatuses.

Other and further objects and advantages of the invention will behereinafter set forth and the novel features thereof defined by theappended claims.

In the drawings:

Fig. 1 is a fragmentary view of a conventional loom mechanism showing myinvention applied thereto in operative position;

Fig. 2 is a side elevation of my invention showing the clamping head incooperative relation to the back wall of the shuttle box;

Fig. 3 is a similar view from the opposite side of the attachment unitalone andrshowing the pivotal character of the clamping head;

Fig. 4 is a longitudinal sectional view on an enlarged scale;

Fig. 5 is a longitudinal sectional view on the plane indicated by theline 5-5 of Fig. 4; and

Fig. 6 is a transverse section on the line 6 6 of Fig. 4.

Like reference characters designate corresponding parts in the severalfigures of the drawings.

Referring to the drawings and specifically describing this invention, itis to be understood that the attachment unit forming its embodiment maybe applied to the conventional looms in present day use without anyradical change in construction, excepting the elimination of the usualgrid which formed an essential feature of such apparatus. In Fig. 1,therefore, it is sufcient to point out that A designates the lay, B theshuttle box at one end thereof, and C the detector fork, the associationwith which parts alone pends a short distance and is formed at its lowerend with a paii of vertical slots 4 adapted to loosely and adjustablyreceive a pair of screws 5 which pass therethrough into a guide blockand support 6 which is clamped against one face of the bracket by saidscrews.

This block is provided with a horizontal rectangular groove 'I toslidingly receive a correspondingly shaped shank or bar 8 to the outerend of which is pivotally connected at substantially its mid point, aclamping head 9 preferably provided on its clamping side or edge with acork abutment face I0. The member 9 is preferably formed with a seriesof openings 9 to permit adjustment of the pivot pin 9a, as necessity mayrequire. It is to be understood that other material than cork may beused for the clamping face of this head such as rubber, felt, and thelike, any one of which When in use is designed to prevent injury to thefilling thread when clamped by said head against a part of the loom ashereinafter described.

As will be noted in Fig. 4, this head is held in vertical positionnormally b-y means of the coiled spring II which extends about thesupporting bar 8 between the block 6 and the rear of the head where itabuts with a washer I2 which acts to hold the head in a verticalposition as before stated. Such spring also tends to hold the bar 8 inits extended or outermost position limited by the Stop washer I3 carriedby the innermost end of the bar and the pin I4 passing therethrough.

It will be observed that as pressure is exerted against the head 9, theyieldable mounting Will allow it to move inwardly or toward the forwardend of the loom through the supporting block 6, this being the usualaction under the pressure produced by the lay, as will be hereinaftermore specifically set forth.

The second essential feature of my invention is the provision of a guiderod I5 which is clamped against the side of the bracket 3 opposite thatoccupied by the block 6. This rod extends rearwardly of the loom in aposition in line with the point usually occupied by the filling gridwhen such element is employed in the construction and the outer end ofthe rod IEa extends sufficiently far to insure its passage beneath thefilling thread E which is to be acted upon in a manner to be set forth.This extremity I5a of the rod may therefore be substantially horizontaland the rod is formed further with an inclined portion |519, up whichthe filling thread slides in the operation of this device. The purposeof this guide rod is to insure the proper positioning of the llingthread E to be engaged and clamped by the head 9 against the rear walloi the shuttle box B. This is its primary function, but of equalimportance, said rod acts to place the filling thread, which has beenclamped under sucient tension to insure the operation of the fillingfork C when said thread has been directed into contact therewith by theinclined portion I5b of the rod as an incident to the beat up movementof the lay.

The operation of this device will be more or less clear from theforegoing description, but it is appropriate to say that .my tensioningatta-chment, when applied to the loom as shown in Fig. l, will overcomethe difficulties hereinbefore mentioned in the following manner when theshuttle has moved over into the shuttle box B and laid the fillingthread. This thread will pass over the rear end of the rod I5 as the laymoves to beat up the filling. When the thread reaches the inclinedportion |512, it is moved upwardly into a position, if it has notalready reached such position for any reason, to be engaged by the headSi which, upon the continued movement of the lay, will cause the threadto be clamped between the face ii) and the rear wall of the shuttle box.Continued movement of the lay forces the head 9 in a forward directionagainst the tension of the spring Ii and at the same time the fillingthread is carried farther up the incline Ilia while held by the clampinghead 9. This causes the thread between the head and the cloth to betensicned sufliciently to lift the detector fork as the beat up movementis completed, the rod i5 having insured the positioning of the thread inproper actuating relation to the fork C under the guiding action of theinclined plane as before mentioned.

t will thus be seen that upon every full beat up movement of the lay,the filling is first clamped and then tensioned sufficiently to insurethe lifting action of the detector fork, preventing the stop mechanismof the loom from being operated so long as a filling thread is presentto be operated upon.

The structure of the parts forming the attachessary angle to insure thefilling passing thereaction of the spring II at its abutting extremity,

Obviously slight changes may be made in the details of construction ofthe attachment without departing from the spirit of the invention andwithin the scope of the claims hereto appended.

Having thus described my invention, what I@ claim as new and desire tosecure by Letters Patent is:

1. In loom apparatus of the class described the combination with a layand detector fork, of

means for holding the filling thread between the shuttle box and cloth,and cooperating means for directing said thread into a predeterminedposition to be gripped by said holding means while actuating saiddetector fork, and common supporting means for the holding and directingmeans for sustaining said means in cooperative relation.

2. Loom apparatus as claimed in claim 1 wherein the directing means actsto positively guide the lling thread into actuating relation to the forkwhile held by the holding means.

3. In loom apparatus of the class described, the combination with a layand detector fork, of a guide member adjacent said fork and extendingrigidly substantially beyond the same and toward the lay, said memberhaving an incline portion for moving the filling thread under tensioninto actuating relation with the fork on the beat up movement of thelay, a slotted supporting bracket for said guide member and clampingblock to which said guide means is connected for vertical adjustment onsaid bracket.

4. In loom apparatus of the class described, the combination with a layand detector fork, of a guide member adjacent said fork and extendingsubstantially beyond the same and toward the lay, said member having anincline portion for moving the filling thread under tension intoactuatng relation With the fork on the beat up movement of the lay,yieldable holding means associated with the guide member for grippingand holding the thread While acted upon by the incline portionaforesaid, and a bracket member carried by the loom for sustaining saidguide member and `holding means as a unit on the loom.

5. A filling tensioning attachment for loom apparatus comprising asupporting bracket, a tensioned bar yieldably mounted on said bracket,and a head pivotally connected to said bar and tensioned to normallyhold a position at an angle to the bar, said head having a at face andbeing yieldable to rock about its pivot when engaged with an arcuatelymoving part of the loom to grip the lling.

6. A lling tensioning attachment for loom apparatus comprising asupporting bracket, a guide block adjustably connected thereto, a barmember slidable in said block, a filling gripping head connected to oneend of the bar member, and spring means for tensioning said bar memberto hold it in its extended position, said spring means coacting with thehead to yieldably hold it in operative position.

'7. A lling tensioning attachment for loom apparatus comprising abracket, a guide rod extending therefrom in position to receive thefilling thread in the beat up movement of the same,

and a yieldable filling thread gripping member connected to said bracketadjacent the rod for holding the thread during the beat up movement forholding and causing tensioning of the thread by the guide rod.

8. A filling tensioning attachment for loom apparatus Comprising abracket, a guide rod adjustably connected to said bracket and adapted toextend toward the lay of the loom, said rod having an inclineintermediate its length to guide the filling thread when contactedtherewith upwardly into actuating position against the detector fork ofa loom, and spring tensioned suplporting means slidably carried by thebracket and extending substantially parallel to the guide rod, saidsupport having a clamping head at the end thereof to which the thread isguided by the guide rod.

DAVID D. GOLDEN.

